For grinding and polishing saws



UNITED srarns PATENT PFICE.

JAMES A. HENDRICK, OF PROVIDENCE,v PENNSYLVANIA.

Macallan Fon enilvnnve AND roLI'sHINe saws.

`Specification of Letters Patent No. 22,803, dated February 1, 1859.

To all 'whom 'it may concern:

Be it known that I, JAMES A. Hnnnnicx, of Providence, in the county of Luzerne and State of Pennsylvania, have invented a new and Improved Machine for Grinding and Polishing Saws, Scythes, and other Like Tools or Implements; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this'specification, in which- Figure l, is an end View of my invention. Fig. 2, a side view of ditto. Fig. 3, a plan or top view of ditto.

Similar letters of reference indicate correspondingparts in the several figures.

This invention consists in the employment or use of a grind stone or polishing wheel, in connection with feed rollers placed in an adjustable frame and arranged relatively with the stone or wheel as hereinafter fully shown and described, whereby a very simple, efcient and economical device is obtained for grinding edge tools and cutlery of various kinds having either plane or concave sides.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, represents a horizontal bed or platform which is supported at a suitable height by pedestals or any suitable framing, and B, is a grind stone or emery wheel which is placed on a horizontal axis in the frontpart of the bed or platform. On the bed or platform A, four stanchions a, are secured, two at its front and two at its back end. These stanchions are each provided with a vertical recess or groove in which upright bars Z), are fitted, one in each groove, the bars being` secured at any desired height by screws o. The upper ends of the bars o, o, at the back part of the bed or platform are connected by a traverse rod cl, and the upper ends of the bars b, at the front part of the platform are connected by a traverse bar e.

C, is a frame which is formed of two side bars f, f, connected by traverse bars g, g. The back ends of the bars f, f, are fitted loosely on the rod CZ, and the front end of the frame is fitted between the bars b, 7), at

- the front part of the bed or plat-form. In

the frame C, two shafts 71., It, are placed longitudinally, the front ends of the shafts projecting through the front traverse bar f, of the frame C, and having each a roller D, formed thereon. The back ends of the shafts z, z., are connected by gearing z', z', z', said gearing being put in motion by bevel wheels j, y', one of which is placed on a driving shaft 7c, in the frame C, and the other on the back end of one of the shafts it, see more particularly Fig. 3. On one end of the driving shaft 7c, a pulley Z, is placed, and a belt m, passes around this pulley and around a pulley n, which is on one end of the axis of the grind stone or emery wheel B. rThrough the traverse bar c, of the front bars b, b, a screw rod o, passes. This rod has a hand wheel 79, on its upper end, and the lower end of the screw rod passes into a traverse bar g, in the frame C, as shown clearly in Fig. l.

`The operation isl as follows: Motion is given the shaft 7c, in any proper manner and the stone or wheel B, is rotated from the shaft lo, by the belt m. The rollers D, are rotated from the shaft 73, by the gearing i, z', z', and j, j. The article to be ground or polished shown in red and designated by E, is placed on the stone or wheel B, and underneath the rollers D. The rollers being made to bear on the article with a greater or less pressure by adjusting the frame C, by means of the screw rod o. The stone or wheel B, and rollers D, rotate in the direction indicated by the arrows, and the article E, is fed along by the rollers D', in the direction of the arrows adjoining it. If a Scythe or other article having concave sides is being ground or polished such article is fed along over the stone in the same plane with its axis, and consequently at right angles with the plane of its motion. But if an article having flat or plane sides, as a saw for instance, is to be ground or polished, the article is fed along over the stone obliquely with its axis as shown in Fig. 3. By thus feeding the article over the stone or wheel the article will be ground with plane sides for the stone or wheel will be in contact with the saw in a line extending obliquely across the article, the feed movement of the article and the cutting capacity of the stone, when the article is being ground, being such that there will be no appreciable departure from a plane surface when the article is finished.

I Would remark that a stone is employed for grinding, and an emery wheel is used for polishing after grinding. The gradual diminishing of the diameter of the stone in consequence of Wear may be compensated for by adjusting the bars Z), in the stanchons d.

I am aware that grind stones and emery Wheels have been arranged in various Ways for grinding, and an emery Wheel is used for saws and other implements 0r tools, but I am not aware that an automatic grinding device has hitherto been devised which would admit of implements being ground eitheil with concave 0r plane sides, as herein shown and described.

I do not claim separately any of the parts herein shown and described, but

I-Iaving thus described my invention, What I do claim as new and desire to secure by Letters Patent, is,

The grind Stone or emery Wheel B, in combination with the feed rollers D, D, alaced in the adjustable frame C, the Whole being arranged to operate substantially as and for the purpose set forth.

JAMES A. HENDRIGK.

Vtnesses T. VON STORCH, E. S. M. HILL. 

